{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "The liver levels of beta - oxidation metabolites of VPA were decreased by day 14 , while the levels of 4 - ene - VPA and ( E ) - 2 , 4 - diene - VPA were not elevated throughout the study ."}
{"Chemical": ["VPA", "4 - ene - VPA", "2 , 4 - diene - VPA"], "Disease": []}